chore(docs): minor update to formatting of API link in README (#467)

Author: stainless-app[bot]

README.md

@@ -4,7 +4,7 @@
 
 This library provides convenient access to the Anthropic REST API from server-side TypeScript or JavaScript.
 
-The REST API documentation can be found [on docs.anthropic.com](https://docs.anthropic.com/claude/reference/). The full API of this library can be found in [api.md](api.md).
+The REST API documentation can be found on [docs.anthropic.com](https://docs.anthropic.com/claude/reference/). The full API of this library can be found in [api.md](api.md).
 
 ## Installation